<template>
  <div>
    <!-- 店铺图片上传 -->
    <el-upload
      ref="upload"
      :http-request="upload"
      :before-upload="beforeAvatarUpload"
      :on-preview="handlePictureCardPreview"
      :on-remove="handleRemove"
      :limit="1"
      :file-list="fileList"
      :on-success="handleSuccess"
      :show-file-list="false"
      class="avatar-uploader"
      :class="[classStyle=='2'?'style2':'']"
      action="''"
      accept
      multiple>

      <div v-if="imageUrl !=''" class="avatar" :style="'backgroundImage:url('+imageUrl+');backgroundRepeat:no-repeat;backgroundPosition:center;backgroundSize:cover;'"></div>
      <i v-else class="avatar-uploader-icon iconfont icon-add"></i>
    </el-upload>
    <div class="clear"/>
    <el-dialog :visible.sync="dialogVisible">
      <img :src="dialogImageUrl" width="100%" alt="">
    </el-dialog>
  </div>
</template>

<script>
import {
  createId
} from '@/utils/index' // 一个生产唯一的id的方法
import OSS from 'ali-oss'
import { selectOSSInfo } from '@/api/set/oss'
// oss 上传
export default {
  name: 'ImgUpload',
  props:['classStyle','previewImg'],
  data() {
    return {
      uploadParams: {
        uploadPath: '',
        uploadSize: ''
      },
      fileList: [],
      dialogImageUrl: '',
      dialogVisible: false,
      imageUrl: '',
      filePath: '',
      ossData:{
        region:'',// 服务器集群地区
        accessKeyId:'',// OSS帐号
        accessKeySecret:'',// OSS 密码
        bucket:'',// 阿里云上存储的 Bucket
      }
    }
  },
  mounted() {
    if(this.previewImg){
      this.imageUrl=this.previewImg;
    }

  },
  created() {
    selectOSSInfo().then(res=>{
      if(res.code==1){
        // res.data=JSON.parse(this.$base64.decode(res.data));
        this.ossData.region=res.data.oss_region;
        this.ossData.accessKeyId=res.data.oss_accessKeyId;
        this.ossData.accessKeySecret=res.data.oss_accessKeySecret;
        this.ossData.bucket=res.data.oss_backetName;
      }

    })
  },
  methods: {
    // 图片上传前验证
    beforeAvatarUpload(file) {
      // file.size / 1024 图片的大小
      const format = /^image\/(jpeg|png|gif|bmp|jpg)$/.test(file.type);
      const isLt1M = file.size / 1024 / 1024 < 2
      this.uploadParams.uploadSize = file.size
      if (!format) {
        this.$message.error('上传图片只能是 JPG，PNG，GIF格式!')
      }
      if (!isLt1M) {
        this.$message.error('上传图片大小不能超过 2MB!')
      }
      return format && isLt1M
    },
    // 上传图片到OSS 同时派发一个事件给父组件监听
    upload(item) {
      let type
      const client = new OSS({
        region: this.ossData.region,
        accessKeyId: this.ossData.accessKeyId,
        accessKeySecret: this.ossData.accessKeySecret,
        bucket: this.ossData.bucket
      })
      switch (item.file.type) {
        case 'image/jpeg':
          {
            type = 'jpeg'
          }
          break
        case 'image/jpg':
          {
            type = 'jpg'
          }
          break
        case 'image/gif':
          {
            type = 'gif'
          }
          break
        case 'image/png':
          {
            type = 'png'
          }
          break
      }
      const key = 'BCenter/time=' + new Date().getTime() + '&id=' + this.guidGenerator() + '.' + type // 存储路径，并且给图片改成唯一名字
      return client.put(key, item.file).then(res => { // OSS上传
        const url = res.url
        this.uploadParams.uploadPath = client.signatureUrl(key, {
          expires: 999999999999999
        }) // 可访问的链接
        this.$refs.upload.submit()
      })
    },
    guidGenerator() {
      var S4 = function() {
        return ((1 + Math.random()) * 0X10000 | 0).toString(16).substring(1)
      }
      return (S4() + S4() + '-' + S4() + '-' + S4() + '-' + S4() + '-' + S4() + S4() + S4())
    },
    handleSuccess(res, file) {
      this.filePath = URL.createObjectURL(file.raw)
      this.fileList = []
      this.$emit('changeSrc', this.filePath, this.uploadParams.uploadPath)
      this.imageUrl=this.uploadParams.uploadPath;
    },
    handlePictureCardPreview(file) {
      this.dialogImageUrl = file.url
      this.dialogVisible = true
    },
    handleRemove(file, fileList) {

    }
    // // 上传
    // submitUpload(){
    //     this.uploadParams.albumId = this.albumId
    //     this.$refs.upload.submit()
    // }

  }
}
</script>
<style rel="stylesheet/scss" lang="scss">
  .upload-demo {
    display: inline-block;
    line-height: 32px;
    margin-left: 10px;
  }

  .avatar-uploader .el-upload {
    border: 1px dashed #d9d9d9;
    border-radius: 6px;
    cursor: pointer;
    position: relative;
    overflow: hidden;
  }

  .avatar-uploader .el-upload:hover {
    border-color: #2c9b69;
  }
  .avatar-uploader.style2 .el-upload{
    background: #fff;
    height: 100px;
    line-height: 100px;
  }
  .avatar-uploader.style2 .avatar{
    height:100px;
  }
  .avatar-uploader-icon {
    font-size: 28px;
    color: #8c939d;
    width: 60px;
    height: 60px;
    line-height: 60px;
    text-align: center;
  }

  .avatar {
    width: 70px;
    height: 70px;
    display: block;
    overflow:hidden;
  }

  .el-upload-list--picture-card .el-upload-list__item {
    width: 100px;
    height: 100px;
  }

  .el-upload--picture-card {
    width: 100px;
    height: 100px;
    line-height: 102px;
  }
</style>
